English Instructor Manual (PDF) - Metric Version - National ...

Gas feeders
Points to consider when inspecting the feeder system of a facility
Key Points: Provide an overview of gas chlorination systems. Include a discussion of:
Health considerations when handling gas chlorine
Special requirements associated with gas chlorine utilization
Storage of cylinders
Key Points: Provide a brief discussion of other disinfectant chemicals that an inspector might
encounter during an inspection.
Key Points: Defi ne pH and the range of pH values commonly associated with swimming pool and
spas. Include a discussion of:
Ideal pH values, acceptable pH values
The effect of pH values outside the generally accepted range
Chemicals generally used to adjust pH in pools or spa
Key Points: Discuss proper chemical handling and storage. Include a discussion of:
NFPA guidelines on how to properly store chemicals considered oxidizers
Hazard communication and personal protection equipment recommendations
Instructor can use chemical storage video to enhance this lesson
Key Points: Provide a brief overview of test kits and testing procedures. Show water testing video
contained on the instructor DVD and then discuss the following:
The four basic methods of testing pool/spa water
The two measurements that have the greatest infl uence on public health illness
prevention
The use of DPD test procedures that allow for differentiation between free chlorine and
total chlorine values in a pool/spa
The requirements for automated testing procedures and ORP values
Key Points: Discuss how to determine pool/spa water balance. Include a discussion of:
What a SI value indicates to a pool/spa operator or inspector
The chemical test needed to determine a SI value for a facility
How to handle a tested value that does not have a specifi c factor on the SI factor chart
Key Points: Have student practice calculating an SI for a given facility. Include:
How to properly use and interpret the table on page 19 as it applies to local codes
A teacher lead example of the calculation procedure
Student practice of calculation procedure
The order and sequence of steps to adjust for a value that should be adjusted to
balance a pool/spa
Final Questions: Ask the participants if they have any questions pertaining to the lesson they
have just completed. If there are participants who are still having trouble with the concepts of this
lesson, offer additional help during a break or after class.
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